Vulnary
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Critical· 9.8official fix available

CVE-2022-50401

A critical bug in the Linux kernel’s NFS server can cause the system to crash or corrupt memory. The flaw occurs when the server handles certain NFSv4.1 requests, potentially leading to a denial of service. It is a serious issue that can affect any Linux system running the NFS service.

publishedSep 18, 2025
last modifiedAug 4, 2026
sourcesNVD
severity · cvss
9.8
critical · how bad it is
exploitation · epss
<1%
33th percentile · chance of exploitation in 30 days
(ai-assisted) A model wrote this summary from the official data, so double-check it against the source before you act on it. Read the official advisory →
auto-deletes from the system
counting…on Sep 3, 2026

An official fix is available, so this entry is kept for 30 days and then removed automatically.

01

Who is affected

Linux kernel users that run the NFS server (nfsd), especially those using NFSv4.1. System administrators and servers that rely on network file sharing are typical users.

02

Real-world impact

An attacker could trigger a crash of the NFS server, making file sharing unavailable and disrupting services that depend on it. The crash could also lead to memory corruption that might be exploitable for further attacks.

03

Why this severity

The CVSS score of 9.8 reflects that the vulnerability can be exploited remotely without authentication, and it can compromise confidentiality, integrity, and availability of the affected system.

04

What to do about it

official fix available
recommended steps
  1. 01Upgrade your Linux kernel to a version that includes the CVE-2022-50401 fix.
  2. 02Reboot the system to load the updated kernel.

NVD description indicates the vulnerability has been resolved.

05

Timeline

  1. Sep 18, 2025 · Sep 18, 2025
    Published
    Disclosed and added to the National Vulnerability Database.
  2. Aug 4, 2026 · 1d ago
    Advisory updated
    The NVD record was last revised.
  3. Aug 4, 2026 · 1d ago
    Official fix available
    A vendor patch or mitigation now exists — see the remediation steps above.
06

How it’s attacked

Attack vectorNetwork (remote)
Attack complexityLow
Privileges requiredNone
User interactionNone needed
ScopeUnchanged
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
07

References & advisories

NVD advisory ↗Search advisories ↗
(ai-assisted) A model wrote this summary from the official data, so double-check it against the source before you act on it. Read the official advisory →